<s>
In	O
computing	O
,	O
Control-V	B-Device
is	O
a	O
key	O
stroke	O
with	O
a	O
variety	O
of	O
uses	O
including	O
generation	O
of	O
a	O
control	O
character	O
in	O
ASCII	B-Protocol
code	I-Protocol
,	O
also	O
known	O
as	O
the	O
synchronous	O
idle	O
(	O
SYN	O
)	O
character	O
.	O
</s>
<s>
The	O
key	O
stroke	O
is	O
generated	O
by	O
pressing	O
the	O
key	O
while	O
holding	O
down	O
the	O
key	O
on	O
a	O
computer	B-Device
keyboard	I-Device
.	O
</s>
<s>
For	O
MacOS	B-Application
based	O
systems	O
,	O
which	O
lack	O
a	O
key	O
,	O
the	O
common	O
replacement	O
of	O
the	O
key	O
works	O
.	O
</s>
<s>
In	O
many	O
GUI	B-Application
environments	O
,	O
including	O
Microsoft	B-Application
Windows	I-Application
and	O
most	O
desktop	O
environments	O
based	O
on	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
,	O
and	O
in	O
applications	O
such	O
as	O
word	B-General_Concept
processing	I-General_Concept
software	O
running	O
in	O
those	O
environments	O
,	O
control-V	B-Device
can	O
be	O
used	O
to	O
paste	B-General_Concept
text	O
or	O
other	O
content	O
(	O
if	O
supported	O
)	O
from	O
the	O
clipboard	O
at	O
the	O
current	O
cursor	B-Application
position	O
.	O
</s>
<s>
Control-V	B-Device
was	O
one	O
of	O
a	O
handful	O
of	O
keyboard	B-Device
sequences	O
chosen	O
by	O
the	O
program	O
designers	O
at	O
Xerox	O
PARC	O
to	O
control	O
text	B-Application
editing	I-Application
.	O
</s>
<s>
Unix	B-Application
interactive	O
terminals	O
use	O
Control-V	B-Device
to	O
mean	O
"	O
the	O
next	O
character	O
should	O
be	O
treated	O
literally	O
"	O
(	O
the	O
mnemonic	O
here	O
is	O
"	O
V	B-Operating_System
is	O
for	O
verbatim	O
"	O
)	O
.	O
</s>
<s>
This	O
allows	O
a	O
user	O
to	O
insert	O
a	O
literal	O
Control-C	B-Device
or	O
Control-H	O
or	O
similar	O
control	O
characters	O
that	O
would	O
otherwise	O
be	O
handled	O
by	O
the	O
terminal	O
.	O
</s>
<s>
This	O
behavior	O
was	O
copied	O
by	O
text	B-Application
editors	I-Application
like	O
vi	B-Application
and	O
Unix	B-Application
shells	B-Operating_System
like	O
bash	B-Operating_System
and	O
tcsh	B-Language
,	O
which	O
offer	O
text	B-Application
editing	I-Application
on	O
the	O
command	O
line	O
.	O
</s>
<s>
The	O
ASCII	B-Protocol
and	O
Unicode	O
representation	O
of	O
"	O
Synchronous	O
Idle	O
"	O
is	O
22	O
in	O
decimal	O
,	O
which	O
is	O
26	O
in	O
octal	O
and	O
16	O
in	O
hexadecimal	O
.	O
</s>
